0560/15.02

HELICOIL®

Special nuts with lock HELICOIL® locknuts

You sure know the following situation: When under load, screw joints tend to loosen. Load can be e.g. vibration, alternating load or general kinetic energy to be absorbed. In many applications it is absolutely necessary to take precautions against unintentional loosening. As a specialist in fastening and assembly technology, we offer you HELICOIL® locknuts for those applications. An efficient combination of two . Without fail.

The functional principle

The consists of a (basic body) and the HELICOIL® screwlock coil thread insert. The screw is locked by a polygonal thread of the HELICOIL® screwlock. These threads have a locking effect on the flanks of the screw or bolt to be screwed in. As a result, there is a highly elastically resilient frictional locking so that the screw is locked to prevent self-unscrewing. Depending on the specific application, increased clamping torques can be achieved with several polygonal threads. The resulting clamping torques can be compared to the specifications in the list of standards DIN 267, Part 15, ISO 2320 or adapted to your individual application.

On page 3, you find some guide values for clamping torques as part of the technical information.

The designs As a partner for the development and production of fasteners, we are looking forward to developing customer- specific solutions in cooperation with you.

Hexagon nut Collar nut Cap nut

Exhaust elbow nut Nut with integrated

2 Advantages

HELICOIL® locknuts offer the following advantages:

■ Clamping effect directly in the thread – elastically resilient ■ Even clamping torque in repeated screwings ■ Constant thread friction ■ Uniform load and stress distribution ■ High temperature resistance ■ Modular design – Profitable – Material and surface in higher quality only required for small (HELICOIL® screwlock)

Technical information

Materials Depending on the requirements regarding media resistance as well as thermal and mechanical properties, we offer different materials and surfaces.

Guide values for clamping torques according to DIN 267, Part 15 or ISO 2320

Number of screwing M 3 M 4 M 5 M 6 M 8 M 10 M 12 M 14 M 16 M 18 M 20 processes 1st screwing-on, max. 0.43 0.90 1.60 3.00 6.00 10.50 15.50 24.00 32.00 42.00 54.00 1st screwing-off, min. 0.12 0.18 0.29 0.45 0.85 1.50 2.30 3.30 4.50 6.00 7.50 5th screwing-off, min. 0.08 0.12 0.20 0.30 0.60 1.00 1.60 2.30 3.00 4.20 5.30

Valid for coarse threads and fine threads. Values in Nm for property class 8.

3 Standard designs

+=

Basic body HELICOIL® screwlock HELICOIL® locknut

d d m

A/F A/F

m

d1 Hexagon nut, similar DIN 934 Collar nut, similar DIN 6923

Standard designs clustered according to materials Nut body: Steel HELICOIL® screwlock: Stainless steel Collar Sizes A/F Height m Property Nut (basic body) HELICOIL® screwlock Item code diameter d [mm] [mm] [mm] class* d1 [mm] Material Surface Material Surface M4 0135 204 0010 7 5 – 6 St – A2 red M5 0135 205 0010 8 6 – 6 St – A2 red M6 0135 206 0010 10 6 – 6 St zinc coated A2 red M6 0135 206 0020 10 6 – 6 St – A2 red M10 0135 210 0010 17 11 – 6 St – A2 red M12 0135 212 0010 19 11,5 – 6 St – A2 red M14 0135 214 0010 22 14 – 6 St – A2 red M16 0135 216 0010 24 16 – 6 St – A2 red M18 0135 218 4010 27 16 – 6 St zinc coated A2 red M20 0135 220 0010 30 20 – 6 St – A2 red M24 0135 224 0010 36 23 – 8 St – A2 red

* Nuts meet the requirements for the proof load test according to DIN EN ISO 898-2 and DIN EN ISO 898-6 in the corresponding property class. Delivery times and minimum order quantities on request.

Nut body: Stainless steel HELICOIL® screwlock: Stainless steel Collar Sizes A/F Height m Property Nut (basic body) HELICOIL® screwlock Item code diameter d [mm] [mm] [mm] class* d1 [mm] Material Surface Material Surface M5 0135 205 0060 8 5 – 70 A1 – A2 red M6 0135 206 0060 10 6 – 70 A1 – A2 red M8 0135 208 0060 13 8 – 70 A1 – A2 red M10 0135 210 0060 17 10 – 70 A1 – A2 red M12 0135 212 0060 19 12 – 70 A1 – A2 red

* Nuts meet the requirements for the proof load test according to DIN EN ISO 3507 in the corresponding property class. Delivery times and minimum order quantities on request.

4 Special designs

+ =

Basic body with washer HELICOIL® screwlock HELICOIL® locknut as collar nut variant with washer Special designs with integrated washer Nut (basic body) HELICOIL® screwlock Sizes Item code Designs A/F Height Collar dia me- Property Size Material Surface d [mm] [mm] m [mm] ter d1 [mm] class [mm] Collar nut with M 8 0135 908 0055 11 14.9 17 10 M 8 x 9.6 A2 silvered integrated washer Collar nut with M 8 0135 908 0056 11 14.9 17 10 M 8 x 9.6 Inconel silvered integrated washer Collar nut with M 8 0135 908 0058 11 14.8 18 10 M 8 x 9.6 A2 silvered integrated washer Collar nut with M 8 0135 908 0059 11 16.8 20 10 M 8 x 9.6 A2 silvered integrated washer Collar nut with integrated washer M 8 0135 908 0061 – 22 17 10 M 8 x 9.6 A2 silvered and internal serration

Delivery times and minimum order quantities on request.

Diverse special designs Nut (basic body) HELICOIL® screwlock Sizes Item code Designs A/F Height Collar diame- Property Size Material Surface d [mm] [mm] m [mm] ter d1 [mm] class [mm] M 4 0135 904 0008 Hexagon nut 10 5 – A1-50 M 4 x 4.5 A2 bright M 5 0135 905 0004 8 5 11.8 8 M 5 x 5 A2 red M 6 0135 906 0004 Cap nut 10 13 15 6 M 6 x 6 A2 red M 6 0135 906 0017 Hexagon nut 10 6 – 8 M 6 x 5.5 A2 silvered M 8 0135 908 0030 Square 14 8.9 – 10 M 8 x 7.4 A2 – Collar nut similar M 8 0135 908 0048 to DIN 6923 13 10 17 8 M 8 x 8 Inconel silvered Collar nut similar M 8 0135 908 0053 to DIN 6923 12 10 19 10 M 8 x 8 A2 silvered silvered, M 8 0135 908 0054 Collar nut similar 13 10 17 8 M 8 x 8.3 A2 to DIN 6923 green M 8 0135 908 0060 Collar nut similar 11 10.8 15 10 M 8 x 8 A2 silvered to DIN 6923 M 10 0135 910 0001 Hexagon nut 15 11 – 8 M 10 x 9.5 A2 red Weld nut with M 10 0135 910 0034 collar 19 12 25 8 M 10 x 9.3 A2 red M 10 0135 910 0040 Collar nut similar 16 10 19 8 M 10 x 8.5 Inconel silvered to DIN 6923 Collar nut similar M 12 0135 912 0013 to DIN 6923 19 14 27 8 M 12 x 8.9 A2 bright M 14 0135 914 0004 Square nut 22 16 – 8 M 14 x 14 A2 bright M 16 0135 916 0019 Square weld nut 24 18.4 – 10 M 16 x 16 A2 red

M 16 0135 916 0021 Square weld nut 28 16 – 8 M 16 x 14 A2 red M 16 x 1,5 0135 916 4005 Hexagon nut 27 10 – 6 M 16 x 1.5 x 9 A2 red M 16 x 1,5 0135 916 4009 Cap nut 24 28 – 6 M 16 x 1.5 x 13.5 bronze bright M 20 x 1,5 0135 920 4007 Hexagon nut 30 15 – 6 M 20 x 1.5 x 13 bronze bright M 24 x 2 0135 924 5003 Hexagon nut 36 19 – A-80 M 24 x 2 x 18 A4 silvered Hexagon nut M 30 x 2 0135 930 5003 with chamber 46 20 – 6 M 30 x 2 x 18.5 A2 red

Delivery times and minimum order quantities on request.

5 Fields of application

HELICOIL® locknuts are used in applications such as the following: ■ Exhaust manifolds ■ Axles and engines ■ Stamping and support posts ■ Exhaust elbows

Metal construction

Construction machinery

Mechanical engineering

0100/14.02 0101/12.02

UNC American National Coarse Thread UNF American National Fine Thread BSW British Standard Whit- ® worth Thread ® BSF British Standard HELICOIL plus Fine Thread HELICOIL plus BSP/ British Standard Further Pipe Thread G ISO 228/1 Pipe Thread BA British Association HELICOIL® Thread technology for Standard Thread Imperial thread inserts for high-strength fastenings metals catalogues Catalogue No 0100 Catalogue No 0101

Thread technology for Imperial thread inserts for metals high-strength fastenings

www.boellhoff.de/en/helicoil-plus http://www.boellhoff.de/en/helicoil-plus-imperial

6 Automotive

Rail cars

Agricultural machinery

0150/14.02 0180/12.02

HELICOIL® tangfree HELICOIL® plus The tangfree coil thread Repairing of damaged insert for a high-strength threads thread Catalogue No 0180

tangfree

Catalogue No 0150 The tangfree coil thread insert HELICOIL® plus repairing of damaged threads for a high-strength thread

http://www.boellhoff.de/en/helicoil-tangfree http://www.boellhoff.de/en/thread-repair

7 Böllhoff International with companies in: Argentina Austria Brazil Canada China Czech Republic France Germany Hungary India Italy Japan Korea Mexico Poland Romania Russia Slovakia Spain Switzerland Turkey United Kingdom USA

Apart from these 23 countries, Böllhoff supports its international customers in other important industrial markets in close partnership with agents and dealers.

MeFaCo Intl. bvba Böllhoff Group ArchimedesstraßeIndustrieweg 12, – B-9200 4 · 33649 Dendermonde Bielefeld · Germany Belgium Phone +49 (0)521Tel.: / 44 82+32 - 05(0)52 (515) 203923 · Fax Fax+49 :(0)521 +32 (0)52 / 44 82219524 - 350 www.boellhoff.comWeb : http://www.mefaco-intl.com · [email protected] E-mail : [email protected]

Subject to technical change. Reprinting, even in extract form, only permitted with express consent. Observe protective note according to ISO 16016.